The 1961 Raytheon 12AU7 tubes in this precisely matched pair have long gray plates and halo getters. The red print on the glass is labeled for Hammond organs (partial). Both tubes test as new with balanced sections.

TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.